Problem: UCS as Virtual Machine Stalls several Times a Day

Problem

UCS as virtual machine stalls several times a day

Environment

UCS running as virtual machine on a KVM hypervisor.
As storage a Ceph Cluster is used.
The UCS vm has a lot of assigned storage devices.

Solution

Increase the maximum allowed value for open files on the KVM system. Check limits.conf for the value of “nofile” and increase the value according to your needs (ie use 65,535).